Hacking Homebrew GBA emulator for PSP (gpSP)

[kernelPANIC]

Hello.
I have a PSP and I'm testing out some GBA emulators (the battery on my EZ-II died and I think it's easier to play using my PSP than getting a new one).
I'm using gpSP, a great emulator that runs most games I've tried with outstanding performance. I was wondering if anyone knew at what processor/CPU speed should I set the emulator to run and still get the best performance from every game (i.e: GBA-like performance).
Why do I need to know this? The lower speed the better, since I think you can save battery life by using lower CPU speeds. I believe the GBA's CPU runs at 16.7 MHz (or 2 ^ 24 Hz) so, would some of the lower speeds still work efficiently?
I'm looking for some feedback which could save me (and others) some time testing several games at different CPU speeds.
Thanks in advance.

 

[phoood]

You could... try experimenting!
Really.

Myself, I just leave the settings alone when ever I use gpSP, but I think lower cpu speeds won't have a huge impact on gameplay.